Pumping system for surface condensers



(No man) C. W. COPELAND.

v PUMPING SYSTEM 303 SURFACE GONDENSERS. No. 273,965. Patented Mar. 13,;18,83.;

WTJQZESSES: .INVENTOR. y mew @M M M awfi- BY Wm. ATTORNEY N. PETERS Fhuwutho u her. wuhington. D. C.

v UNITED STATES PATENT Fries.

' pose. Both pumps in either of these arrange-- CHARLES WV. COPELAND, OF BROOKLYN, NEW YORK.

PUMPING SYSTEM FOR SURFACE-GONDENSERS.

SPECIFICATION forming part of Letters Patent No. 273,965, dated March 13, 1883.

Application filed March 25, 1882. (No model.)

To all whom it may-concern vBe it known that I, CHARLES W. Corn- LAND, a citizen of the United States, residing at Brooklyn, in the county of Kings and State of New York, have invented a certain Improvement in Pumping Systems for Surface- (Jondensers, of which the following is a specification.

The air-pump and the water-circulatin g pump 1 of a steam-engine using surface-condensation are ordinarily driven from the same source of power, anda separate and independent steamcylinder is frequently employed for that purments, andin any similar arrangement, are necessarilydriven at the same relative speed, and it sometimes occurs in the changes involved, more particularly in ocean navigation, that the conditions under which the two pumps are operated areso altered that they will require different adjustments to keep them working together at the best rate for each of them and for the best aggrega'te result. 'It the air-pump should be driven at the most advantageous velocity, so far as it alone may be concerned,

the circulating-pump maybe at the same time sending too great quantity of water through the condenser, and not only wasting the power, but causing the feed to be returned to the boiler much colder than is desirable. 0n the other hand, it' the speed be reduced to meet the conditions of the feed, the air-pump will not be worked to the best advantage. The

- usual practice in such cases is to regulate the circulation by a valve in the suction of the circulating-pump but this expedient involves disadvantages of its own, as the contraction of the suction, although it lessens the delivery, may increase the labor of the pump.

My invention relates to this class of combined pumps; and it has for its object the regulation of the circulating-pump in such a manner that its work may be perfectly adjusted, and that the power applied will he in proportion only to the amount of work done, with but the slight variation due to friction.

A pump constructed with my improvement may be driven at a high speed or the speed required for the air-pump, and the delivery reduced to a minimum by an open communication between the opposite sides of the piston, the only power wasted in such circumstances being that due to the passage of the water from end to end of the pump-cylinder. The air-pump may be driven at the. most advantageous speed,and the water-pump may be regulated to secure the best result with the speed, without imposing useless work upon the pumping machinery, whether it be an independent engine or otherwise.

To enable others skilled in the art to. which it appertains to make and use my invention, I will proceed to describe its construction and operation, with reference to the drawings, which represent a horizontal arrangement of pumps worked by an independent steam-cylinder. r V

The invention may be applied in a similar manner to vertical pumps, or to those worked by connections from the main engine".

Figures 1 and 2 are respectively an eleva tion and a plan of an independent combina tion of a steam-cylinder, A, an air-pump, B,

and a circulating-pump, (J, all placed in the valve is closed the pump will be permitted to do its full amount of work,and when the valve is open the water is simply passed from end to end of the pump, so that the adjustment of the valve fully regulates the circulation without throwing materially more work upon the pump than is required to accomplish its purpose of circulating the water through the condenser. r

Fig. 3 represents a circulating-pump, partly in section, and a method of adapting the im-. provement to a pump already constructed. The pipe 0 connects the ends of thepump, and the opening is regulated by the valve (1. The same end may be accomplished by valves in the delivery valve-chest, communicating with the pump-chamber, with the openings regulated in any of the ordinary ways, so that the passage of thelwater through the condenser the two pumps may be operated at'the speed may be regulated within the capacity of the required by the air-pump to effect its Work and pump. the water delivered to the condenser in quan- I claim as my invention and desire to secure tity to meet the requirements of the boiler- 5 by Letters Patentfeed.

In apumping system for surface-condensers, the'combination of an air and a water pump driven by the same motor, the latter provided Witnesses: with a circulating-passage having a control- HARRY ORASKE, ro ling valve substantially as shown, whereby WM. KEMBLE HALL.

CHAS. W. COPELAND. 

